Watching the rapturous reactions to the performances of Justin Bieber and Ariana Grande on the American Music Awards last Sunday ... hits from their recent albums on Sunday’s show. Billboard gushed over Mr.

The record was released in October as the singer’s second solo album, following 2013’s Stars ... and on-and-off boyfriend Justin Bieber. Like his ex, Bieber was also slated to hit the American Music Awards stage for …